UPSD3433EB40U6 STMicroelectronics, UPSD3433EB40U6 Datasheet - Page 113

• Manufacturer Part Number: UPSD3433EB40U6
• Description: MCU 8BIT 8032 128KB FLASH 80TQFP
• Manufacturer: STMicroelectronics
• Series: µPSDr

Specifications of UPSD3433EB40U6

• Core Processor: 8032
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, IrDA, SPI, UART/USART, USB
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 46
• Program Memory Size: 160KB (160K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 80-TQFP, 80-VQFP
• For Use With: 497-5518 - EVAL BOARD RFID READER497-5046 - KIT TOOL FOR ST7/UPSD/STR7 MCU
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Other names: 497-5660

uPSD34xx
22.2
Table 51.
Table 52.
Pulse width selection
The IrDA interface has two ways to modulate the standard UART1 serial stream:
1.
2.
The PULSE bit in the SFR named IRDACON determines which method above will be used.
According to the IrDA physical layer specification, for all baud rates at 115.2k bps and below,
the minimum data pulse width is 1.41µs. For a baud rate of 115.2k bps, the maximum pulse
width 2.23µs. If a constant pulse width is to be used for all baud rates (PULSE bit = 0), the
ideal general pulse width is 1.63µs, derived from the bit time of the fastest baud rate (8.68µs
bit time for 115.2k bps rate), multiplied by the proportion, 3/16.
Bit
7:4
3:2
1:0
An IrDA data pulse will have a constant pulse width for any bit time, regardless of the
selected baud rate.
An IrDA data pulse will have a pulse width that is proportional to the the bit time of the
selected baud rate. In this case, an IrDA data pulse width is 3/16 of its bit time, as
shown in
BR3
0
0
0
0
0
0
0
0
1
1
1
1
1
Baud rate selection register (SFR xxh, reset value xxh)
Baud rate of UART#1 for IrDA interface
IRDAEN
Symbol
BR[3:0]
PULSE
Figure 40 on page
BR2
R/W
R,W
R,W
R,W
0
0
0
0
1
1
1
1
0
0
0
0
1
111.
Specify Baud Rate (see
IrDA Pulse Modulation Select
0 = 3/16 bit time pulses (not recommended)
1 = 1.627µs
0 = IrDA Interface is disabled
1 = IrDA is enabled, UART#1 outputs are disconnected from
Port 1 (or Port 4)
BR1
0
0
1
1
0
0
1
1
0
0
1
1
0
Table
Definition
BR0
52)
0
1
0
1
0
1
0
1
0
1
0
1
0
Baud Rate (kbps)
IrDA interface
115.2
57.5
38.4
19.2
14.4
12.8
9.6
7.2
4.8
3.6
2.4
1.8
1.2
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